make an object exclude a light source in cycles
If no lights affect your house, how is it going to be lit?
You got 3 choices:

Go to properties>Object>Cycles settings and uncheck SHADOWS (your object cannot cast or recieve shadows) try find what works for you.

Second choice: Use EXCLUDE layers on the PASS LAyer system (that requires a little bit of knowledge on how to exclude things) -again, if you exclude the house, it will appear in your render totally black since no lights lit the object.

Road 3: Setup a LIGHT PATH shader node to exclude to recieve any lights or cast shadow on the object. Have a "per shader per object" override material ready before render. This also requires a bit of work on your side. 

(Light emission with a shader / unlit object):


But hey, these are the possibilities.
Thanks if you vote me up as Answer.

BFCT_Schiller